The Siberian Lake Some Geologists Think Was Made by the Tunguska Object
Lake Cheko sits about 8 kilometres northwest of the [Tunguska blast](/articles/tunguska-event-1908) epicentre. It is small, oval, unusually deep, and has no documented existence before 1929. An Italian-Russian team has spent twenty years arguing that a fragment of the 1908 impactor punched it. Most other researchers disagree.
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